Flight Routes from London to Seattle Tacoma

Trip type

Our cheapest offers for flights from London to Seattle Tacoma

Here you can compare cheap flights from London (LON) to Seattle Tacoma (SEA) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Seattle Tacoma. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
London
Seattle-Tacoma
Outbound
24/03/26
1 Stopover (FRA)
LH0921, LH0490
13h 40min
Return
31/03/26
1 Stopover (IAD)
OS7908, OS7806
14h 55min
Lufthansa ?
£376
Best option
London
Seattle-Tacoma
Outbound
23/05/26
direct
VS4036
10h 26min
Return
30/05/26
direct
VS4037
09h 50min
Virgin Atlantic Airways ?
£483
London
Seattle-Tacoma
Outbound
17/08/26
2 Stopovers (FRA, PDX)
LH0923, DE2090, AS0430
19h 06min
Return
15/09/26
2 Stopovers (SFO, FRA)
AS1364, DE2097, LH0914
21h 09min
Lufthansa, Condor, Alaska Airlines
£970
found yesterday
London
Seattle-Tacoma
Outbound
23/05/26
1 Stopover (KEF)
FI0455, FI0685
22h 20min
Return
30/05/26
1 Stopover (KEF)
FI0680, FI0454
20h 40min
Icelandair
£387
London
Seattle-Tacoma
Outbound
26/03/26
1 Stopover (KEF)
FI0455, FI0683
31h 10min
Return
02/04/26
1 Stopover (KEF)
FI0682, FI0454
17h 20min
Icelandair
£397
London
Seattle-Tacoma
Outbound
23/05/26
1 Stopover (KEF)
FI0455, FI0685
22h 20min
Return
30/05/26
1 Stopover (KEF)
FI0682, FI0454
17h 20min
Icelandair
£416
London
Seattle-Tacoma
Outbound
25/05/26
1 Stopover (CPH)
SK1508, SK0937
26h 15min
Return
07/06/26
1 Stopover (CPH)
SK0938, SK1517
17h 45min
SAS Scandinavian Airlines ?
£447
London
Seattle-Tacoma
Outbound
25/05/26
1 Stopover (CPH)
SK1508, SK0937
26h 15min
Return
07/06/26
1 Stopover (CPH)
SK0938, SK1501
21h 45min
SAS Scandinavian Airlines
£448
London
Seattle-Tacoma
Outbound
25/05/26
1 Stopover (CPH)
SK1508, SK0937
26h 15min
Return
07/06/26
2 Stopovers (CPH, OSL)
SK0938, SK0452, SK0805
38h 40min
SAS Scandinavian Airlines
£450
London
Seattle-Tacoma
Outbound
25/05/26
1 Stopover (CPH)
SK1508, SK0937
26h 15min
Return
07/06/26
2 Stopovers (CPH, OSL)
SK0938, SK0452, SK0805
38h 40min
SAS Scandinavian Airlines
£453
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from London to Seattle Tacoma

Favourite airline: Icelandair
The most popular airline for flights from London to Seattle-Tacoma is Icelandair.
Icelandair
50 %
Turkish Airlines
18 %
British Airways
10 %
Stopover flights are the cheapest connection
Direct flights on this route are £454.00 more expensive on average than flights with a stopover.
non stop flight
1 stop
2 stops
09h 45min
15h 35min
17h 30min
£973
£519
£1,330
Favourite connection: via Reykjavik-Keflavik
Stopover flights on this route are especially popular via Reykjavik-Keflavik, making up 54 % of bookings.
Route
bookings
1 stopover Reykjavik-Keflavik International
15h 35min, from £519
54 %
1 stopover Istanbul
32h 05min, from £891
19 %
Direct flights
09h 45min, from £973
16 %

Important flight information

Flight information: London - Seattle-Tacoma

Outbound and return from £375.15
Flight duration min. 09:50 / max. 09:55
Return flight duration min. 09:20/ max. 09:30
Distance 7721 km
Flights per week 19
Departure airport Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport Airport Seattle-Tacoma (SEA)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Seattle-Tacoma
Flight destinations with a similar price